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Cancer tissues displayed moderate cytoplasmic positivity with additional nuclear staining in many cases. Pancreatic cancers showed additional membranous positivity. Several gastric and renal cancers were weakly stained or negative.
A majority of cancer tissues displayed weak to moderate cytoplasmic staining. Several urothelial cancers and a few renal, panceratic and liver cancers were strongly positive, while all lymphomas and most stomach cancers were negative.
Proteins of the matrix metalloproteinase (MMP) family are involved in the breakdown of extracellular matrix in normal physiological processes, such as embryonic development, reproduction, and tissue remodeling, as well as in disease processes, such as arthritis and metastasis. Most MMP's are secreted as inactive proproteins which are activated when cleaved by extracellular proteinases. However, the protein encoded by this gene is a member of the membrane-type MMP (MT-MMP) subfamily; each member of this subfamily contains a potential transmembrane domain suggesting that these proteins are expressed at the cell surface rather than secreted. [provided by RefSeq, Jul 2008]